Locomotive exhaust-pipe and spark-arrester.



R. H. SMITH @L B. CRASWELL. LOGOMOTIYE EXHAUST PIPE AND SPARK ARRESTER. I .APPLICATION FILED MAY 8, 1911. 1,032,711, Patented Ju1y16, 1912.

2 SHEETS-SHEET 1.

R. H. S'MITH'z B. CRASWELL. i LocoMoTIvB EXHAUST PIPE AND SPARK ARRESTBR. APPLIOATION FILED MAY 8, 1911`.

:l-932,71 1 .l Patented July 16, 1912.

2 SHEETS-SHEET 2.

JLGMX ruf/R arroz/vers l .4o .extending portion 7,

` the right of way from the following 2o,

UNTTED ROBERT H. SMITH AND BRADWELL CRASWELL, OF MELROSE,

MINNESOTA.

Specification of Letters Patent.

Application led May 8, 1911.

Patented July 16, 1912.

serial No. 625,855.

To all whom 'it may concern:

Be it known that we, ROBERT H. SMITH and BRADWELL CRAswELL, of Melrose, Stearns county, Minnesota, have invented certain new and useful Improvements in Locomotive Exhaust-Pipes and Spark-Ar- 1resters, of which the following is a specification..

The object of our invention` is to provide an` improved exhaust pipe and spark arrester for a locomotive to the end-that the burning-y cinders entering the smoke .box from the-flues will be crushed or broken and extinguished 4before enteringthe stack, thereby avoiding the danger of fire along by the passage of a locomotive.

Other objects of the invention will appear detailed description. The invention consists generally in valrious constructions and combinations, all

as.4 hereinafter described and particularly pointed outin the claims.

'ln the accompanying drawings forming part of this specification, Figure 1 is a vertical, sectional view through the forward portion of a locomotive boiler, showingA the smoke stack, flue sheet, and the location of our inventionwith respect to the stack and .the exhaust nozzle, Fig. 2 is a transverse sectional view .through the forward portion of .the smoke box, looking toward the flue sheet.

In the drawing, 2 represents the boiler having. a flue sheet 3 iand a series of 'flues ,L1 as usual in locomotive boilers.

5. is' an imperforate plate, extending transversely of the smoke box 6 in front of theflue sheet "from lside to side of the boiler and inclined forwardly and downwardly and provided with a horizontal, forwardly also imperforate, through which the exhaust nozzle 8 projects, and has a close joint therewith. This plate is generally known as the smoke box dead plate. The depending is suspended at the forward portion of the plate 6 and is vertically adjustable, as usual A in locomotives.

10 represents-fthe stack and y11 is a pipe communicating with'th stack atits upper end and having its lower end seatedo the portion 7 of the plate 5 and inclosing the open upperend of the. exhaust nozzle. The -plpe 11 has angopening 12' inits side wall communicating with thel space at' the'forbottom of the smoke box.

'which might be draft plate 9 f ward endof the smoke box and above thel draft plate 9. This opening. is preferablyY oval in form, as shown in Fig. 2, though it may be of any suitable shape and size. collar 13 is secured to the edges of this opening and projects box and to' this collar our improved spark arresting device is secured by suitable means.

The spark arresting device comprises a frame 14; to which are secured plates 15, preferably substantially sector shaped, provided with elongated perforations l5', as in-v dicated 1n Fig. 1. A topl plate 16 is secured lto said side rplates and is preferably forwardly and downwardly inclined, as shown in Fig. 1, and the opening between the forward edge of the top plate and the lowerv wall of the collar 13 is filled by a screen 17 of suitable mesh to' cause the cinders contacting therewith to be` crushed and broken anddeposited in the y The screen is preferably curved, as shown, and is inclined from its upper edge downwardly and backwardly toward the flue sheet,-so that the cinders will strike it angularly orat atan ent and while being broken or crushed by.'V

forwardly into the smoke such contact will not tend to cling to-the screen `or become wedged in its A meshes, the case should the screen be arranged at right angles to the direction of travelof the cinders.

yVle. prefer Valso to suspend chains 18 or similaragitating means from the top plate 16 and allow them to reston the inner sur face of the screen, the suction through the screen causing the agitating means to be moved back and .forth thereon and preventing` ,the meshes of the screen from becoming' clogged.` 4We have shown three of these chains, but-.anysuitable number may be employed. We prefer also to provide wings ordefiectors 19 projecting laterally on each r side of the top. plate 16 -and operatingto break and pulverize the cinders that may contact therewith and being preferably in clined downwardly to direct the crushedmaterial to the bottom of the box. These Wings may be made of any suitable size and `may be mounted on the top of the spark 'arresting apparatus in any suitable Wuy.-

In the operation of the apparatus, a strong draft will beycreated through the ex.-

haust nozzle past the opening into the pipo products of combustion will be drawn down v the cinders that all of 1l andl thevcinders carried along with the under the dead plate beneath the draft plate and sucked into contact with the inclined screen, which will so crush and prulverize the sparks will be extinguished and most of the' material will drop from the screen to the .bottom of the box, the products of combustion passing into the pipe l1 and from rthence, to the stack. combustion A portion 'of the products 'of' will pass through the side plates, which will coperate with the screen to crush and pulverize the cinders, so that when the products of combustion are nally discharged from the stack-said products will be practically.;

freefrom cinders, or, if cinders or portions thereof pass into 'the stack, the're Will-be entirelyvextinguished and ignition of combustible material along ,the track will be entirelyprevented. ,s t

1 The'location of the exhaust with respect t0 :the lintake opening of the stack is such y' that a strong draftwill becreated through sweepingv back and forth thereon, will y'ticles vand thefscreenandthe-side plate and `most of the cinders will be crushed by contact there- 'with, and should any of the finer particles lodge. in the screen, the4 agitating means,

prevent .any accumulation of such small parpreserve the screen 'or portions thereoffrom becoming clogged.

' ,This device,in,addition to being an exc haust pipe and spark arrester Will also effect considerable saving in the consumption of fuel. We have also found from' various experiments vthat the apparatus will preventa clogging and4 choking of the dues, due to the fact that the draft is concentrated at one point inthe pipe and causes an equal or uniform. draft through all of the iiues.

Wye do. not limit ourselves to the.` details `ofthe construction, as the same may be varied. in many rparticulars without' departing from, our invention. i

We claim as our` invention y y1. The combination,- with a boiler" having a Hue sheet andlues, a smoke box and a Idead plate 'extending across said box in front V`of said due sheet, of an exhaust noz'zle having its open "upper end projecting throughl said dead plate', a. pipe seated on' said dead plate'and vinclosing the open end of lsaid l nozzle,`said pipe communicating with thev smoke vstack and provided withia'n opening I,in its lower VVfor-ward walls above' the open end fof said nozzle,- the side? and rear walls {of-said pipe'being imperforate, and a spark. V,arrester covering/said opening and against 'which Asparlg'arrester the-cinders arev drawn' by thes'ufcti'onpf the'exliaustfpast said pipe opening. f y 2. The combination, with a" boiler having flue sheetiandpues', and a smokeI box. 1o'- c'ated in frontlof saidue sheet, offeny exhaust nozzlehavin an o en u er end an vupright pipe communicating with the smoke stack and having a closed lower end through A which said nozzle-.extends into said pipe, said uprightV pipe having an. opening in the lower portion' of` its upright wall, the relInaining portionof said wall being' imperorate, said. opening being located above the lowefendof said pipe, a collar enclosed circling said. opening and projecting' horizontally into -saidsmoke box, and a spark arrester secured to 'sai'd collar and covering .the opening into; said-*pipe and operating to Vcrush or V therewith. p

3. The combination, ivith a boiler having a Hue, sheet and' f lues and V.a smoke boxin pulverizethe cinders contactingfront of said flue Sheet, of anexhaust nozzle, g

exhaust nozzle and its upper end communieating with the smoke stack, said pipe having an openingI in itsfront walls past which the exhaustis directed by said nozzle, and

a pipe having its lower .end inclosing said a spark arresting device disposed in said opening and comprising top 'and side platesy .walls extending vonly partially around said `a screen atv the'outer edges of said top and end," a pipe having g pipe and past which opening thexhaustis'- directed by said nozzle, --a sparkA arresting f device mounted in' said lopeningfand com-f prising a top plate; perfoiate'l;side plates and a screen secured to the outer edges 'of said top `and side/plates andl to ythe lower` edge of said opening, said screen 'operating to crush or pulverizeftheucinders. contactingl therewith.

5. The combination, witha boiler having flue Sheet and'es front of saidiiue .sheen-of an exhaust nozzle' in its walls,-a spark arresting device secured tosaldwalls around said opening and corn-A prislng top and side plates projecting into pipe, wings projecting into said smoke box laterally withvrespect tovsaid side plates, and' a screen interposed betweensaid top and side plates and inc y y and closingthe passage between saidjplates tothe openmgin said pipe,thesuction within ined wit-hfrespect to said pipe and, a smoke boin ha-ving an open upper end, apipe comm'u'nieating with the smoke stackv above said exi .haust-.nozzlesaid pipe having an opening y said smokeboxubeyond 'the surface of' said 125 said pipe causing the cinders to be directed against said screen and broken and crushed thereby.

6. The combination, with ra boiler having a iue sheet and ues and asmoke box, of an exhaust nozzle having an open upper end, an upright pipe having a closed lower end inclosi-ng the upper end of said nozzle and communicating with the smoke stack, said pipe having an opening in the lower part of its upright wall extending only partially around said pipe, past which opening the exhaust is directed by said nozzle, said open ing being above the closed lower end of said pipe, a spark arresting device secured to the walls of said pipe around said opening and projecting horizontally therefrom-into said smoke box, said spark arresting device having perforate side walls and a screen disposed between said walls and arranged at an 'incline and against which the cinders are drawn by the suction through said opening.

7. The combination, with a boiler having a flue sheet and lues and a smoke box, of an exhaust .nozzle having an open upper end, a pipe inclosing the open end of said nozzle, said pipe communicating at its upper end with the smoke stack and having an opening in its lower forward walls above said nozzle and past which opening the exhaust is directed by said nozzle, the walls of said pipe being otherwise imperforate, -said opening communicating with the forward portion of the smoke box, and a screen disposed in front of said openingand against which the c inders are drawn by the suction through said opening.

8. The combination, with a boiler having a flue sheet and fines, a smoke box, a. dead.

plate extending across said box in frontof said flue sheet and provided with a horizon- .i

tal extension, of an exhaust nozzle having its open upper end projecting through said extension and forming a closejoint therewith, a pipe seated on said extension fand inclosing the open end of said nozzle, said pipe communicating with the smoke stack and having an opening in .its forward 'lower walls above the open end of said nozzle'and through which opening a suction is created by the passage of the exhaust from said nozzle, the walls of said pipe being otherwise imperforate, vand a screen disposed in front ofsaid opening and operating to deflect the broken and crushed cinders downwardly to the bottom of said smoke box.

9. The combination, with a boiler having a flue sheet and flues, and a smoke box, of.

an exhaust nozzle having an open upper end, a pipe having a closed lower end extending down to and inclosing the open upper end of said nozzle and leading therefrom to the smoke stack, said pipe having an opening nin its upright wall near said nozzle above the closed lower end of said pipe, said pipe, except for said opening, being imperforate, and a spark arrester secured to the walls of said pipe around said opening, said arrester projecting outwardly from said pipe and comprising a supporting collar, perforate side plates, and an imperforate top, and a screen disposed between-said top and side plates and in the path of the material drawn toward saidopening by the suction in said pipe.

In witness whereof,l we have hereunto set our hands this 29th day of' April, 1911.

' ROBERT H. SMITH.

BRADVELL CRASVELL.

Witnessesz E. W'. QUINN,

W'. W. CAMPBELL.

Copies of this patent may be. obtained for five cents each, byddressing the Commissioner of Patents, Washington, D. C. 

